Lock.



A. ARENS.

LOCK.

. APPLICATION FILED SEPT. 18, 19 12.

1,050,784. Patented Jan. 21, 1913.

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WITNESSES V m '1 INVENTOR ATTORNEYS COLUMBIA PLANOGRAPH CO.,WASH1N uuuuuuuu c.

A. ARBNS.

LOOK.

. APPLIOATION FILED SEPT. 18, 1912. 1,050,784. Patented Jan; 21, 1913.

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lmsfi y ihgka Z8 lwlimmpa I LE"! ATTORNEYS UNITED STATES PATENT OFFICE.

AUGUST ARENS, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE AMERICAN HARDIVARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Specification of Letters Patent.

Application filed September 18, 1912.

Patented Jan. 21, 1913.

Serial No. 720,911.

To all whom it may concern Be itknown that I, AUGUST ARENS, a citizen of the United States, residing at- New Britain, county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact descript-ion.

This invention relates to looks, and more especially to a lock which is particularly useful when employed on the doors of a bathroom opening upon two apartment-s connected by the bathroom. In such an instance, similar locks are provided for both doors entering the bathroom from the two difi'erent and adjacent apartments. It is desirable to provide means whereby the occupant of one apartment who is using the bathroom may prevent access to the bathroom from his own apartment by the maid, etc., while the bathroom is accessible at the same time to the occupant of the adjoining apartment. Sometimes the occupant of one or both of two such adjoining apartments is not desirous of paying for the privilege of the bathroom, so it is desirable to provide means for shutting out access to the bathroom from one or both apartment sides. It is necessary also, in the event of emergency, such as accident or suicide,to provide means for entering the bathroom from an apartment side when the door has been locked from the interior against intrusion by the maid, etc. So also the occupant of one of two such adjoining apartments may be desirous of looking himself in against intrusion from the adjoining apartment through the bathroom door.

My invention is designed to provide a lock which may be used to meet such requirements.

In the following description I shall designate the apartment side of the bathroom door look as its exterior, and the bathroom side of said look as its interior.

In its broad aspect, therefore, the invention contemplates the use in connection with a latch bolt operable by a knob spindle, and independently by a key or keys from the exterior, of means operable from the interior, for dead-locking said bolt against retraction from the exterior by a certain key or keys, of means operable from the exterior through a certain other key or keys for retracting said bolt when dead-locked from the interior, of means operable from the exterior for locking said bolt against retraction through any other means, thereby shutting out the bathroom, and further in providing means operable from the exterior through a certain key or keys for dead-locking said bolt against retraction from the interior. These and other advantages will be apparent from the detailed description following and from the accompanying drawings forming part thereof and illustrating a preferable embodiment of the invention.

In these drawings Figure 1 is a front elevation of the assembled lock with the cover plate and its tumbler barrel removed, and with the parts in normal unlocked position, and with the latch bolt projected. Fig. 2 is a top plan View of the dead-locking slide removed from the lock case. Fig. 3 is an edge elevation of said slide. Fig. 4 is a partial front end elevation of the lock, with parts broken away. Fig. 5 is a fragmentary front elevation of the assembled lock, with the cover plate and tumbler barrel removed, and with the parts in the position they occupy when the dead-locking slide is moved into bolt locking position. Fig. 6 is a fragmentary view in front elevation of the assembled parts of the lock, the cover plate and tumbler barrel being removed and the blocking dog being thrown in to block the thumb turn by the roll-back arm and pivoted pawl. Fig. 7 is a view in rear elevation of the tumbler barrel, showing the roll-back arm carried thereby. Fig. 8 is a fragmentary view in front elevation, showing the shut-out dog in looking engagement with the dead-lock ing slide. Fig. 9 is a vertical section taken on the line 9-9 of Fig. 8. Figs. 10 to 14 inclusive, are elevations respectively of the change key, floor-master key, grand-master key, emergency key and shut-out key.

Referring to the drawings by numerals, 1 indicates the lock case, 2 the face plate thereof and 3 a latch bolt of usual construction.

4 designates a hub for an interior knob spindle 5, which hub carries roll-back arms 6 as usual, adapted to be actuated by the turning of the interior knob (not shown). These roll-back arms bear against a springpressed yoke 8, adapted, when moved by said arms, to engage an abutment 9 on-the end of the latch. bolt 3 and retract said latch bolt. I prefer to make the exterior knob 7 a fast knob (see Fig. 4), so that it serves as a handle merely, although it may be made rotatable, and night latch mechanism provided as is common in the art. The latch bolt 3 at its rear end is also provided with a strike lug 10 adapted to be engaged by the roll-back arm of the lock mechanism, as will be hereinafter described.

In order to dead-lock the latch bolt 3 against retraction, Ihave provided what I term a dead-locking slide in the form of a sliding plate 11, the movement of which in either direction is limited by stop lugs 12 in the lock case 1. This locking slide 11 is suitably guided in the lock case, and at its lower end is provided with a dead-locking shoulder 13, which, when the slide is moved downwardly from the position shown in Fig. 1 to that shown in Figs. 5 and 6, is moved to the rear of the latch bolt 3 and forms an abutment engaging its rear end, thus preventing its retraction. Adjacent the edge of the case and intermediate its ends, the slide 11 is formed with a recess 14 inclosing a pin or stud 15 projecting upwardly from the lock case and having an anti-friction roller 16 mounted thereon. Upon the face of the slide 11 adjacent this pin, is mounted a. pivoted pawl 17 engaged by a spring 18 and normally pressed against the friction roller thereby. The edge of this pawl which bears against the roller, is formed with a bevel 19, its opposite outer edge being provided with a projecting portion forming in effect a cam face 20. As a means for retaining this slide in bolt looking and unlocking posit-ions, its outer edge is formed intermedate its ends with a. toothed detent 21, on either side of which the lower edge of the slide is cut away to form ledges 22 overlying and retaining in a suitable seat formed in the lock case, a leaf spring 23. This spring is provided with an inwardly projecting V-shaped tooth adapted to engage with the toothed detent 21. This detent, when the slide is actuated to either position, is adapted to snap over this projection and rest on one side or the other thereof, this position marking the limit of movement in either direction, and the slide being held in such position by the pressure of the spring tooth against a face of the detent 21. To provide for the actuation of this locking slide 11 into bolt locking and unlocking position from the interior of the door, I employ a thumb turn (not shown) whose spindle 24 carries a hub 25, provided with a rollback arm 26 extending therefrom and operating within a recess 27 formed in the outer edge of the slide 11 adjacent its upper end, and adapted to be moved to bear against the adjacentfaces of the slide to move it downwardly and upwardly into bolt locking and unlocking position. Extending from the hub 25 at a point opposite its roll-back arm 26 is an abutment arm 28 having a locking shoulder 29 formed thereon. Beneath the arm 28 the hub is formed with fiat surfaces 30, against which bears a leaf spring 31 suitably retained in the lock case and designed to hold the hub 25 in either of its turned positions.

Mounted on a pivot pin 33 projecting upwardly from the lock case at a point adjacent the dead-locking slide and its pivoted pawl, is ablocking dog 32 having a blocking arm 34 extending therefrom and designed to cooperate with the locking shoulder 29 on the abutment arm of the thumbturn hub. At a point opposite this blocking arm 34 the dog is provided with a projection 35 extending therefrom and designed to cooperate with the cam face 20 of the pivoted pawl 17. This dog is also provided at a point intermediate the arm 34 and projection 35, with. an abutment finger 36 extending therefrom and lying in the line of movement of a lug 37 projecting upwardly from the dead-locking slide 11. Mounted on the pivot pin 33 and rest-ing on the upper face of the blocking dog 32 is a washer 38, and a coil spring 39 is seated over said stud 33 and engages said washer and. the under side of the cover plate of the lock case to press said washer against said dog to thereby hold it frictionally against accidental turning movement.

40 designates a shut-out dog having a pivot pin 41 extending therefrom and journaled in the lock case at a point adjacent the lower end of the dead-locking slide 11. This pivoted shut-out dog is provided with a curved slot 42 therein taken on the pin 41 as a center. The guide pin 43 is screwed into the lock case and enters through this curved slot 42. The dog is also provided with a key-slot 44, in the rear of which the lock case is provided with a centering recess 45. The lower and inner end of the shut-out dog is provided with a locking abutment 46 adapted to enter a correspondingly shaped recess 47 in the outer edge of the dead-locking slide 11 adjacent its lower end, which recess is positioned to cooperate in this manner with the shutout dog, when said slide has been projected downwardly to dead-lock the latch bolt (see Fig.

A tumbler barrel 48 is secured to the outer face plate of the lock case in substantial alinement with the pivot stud 41 of the shut-out dog, and carries two concentric rotating tumbler barrels or sleeves 49 and 50. The inner of these barrels is operable independent of the outer barrel by a series of keys, such, for example, as what I term the floor-master and grand-master keys, the

bitting of these keys being such as to re tract the pin tumblers to permit this inner tumbler barrel only being rotated in a manner well known in the art. This inner sleeve 49 carries at its end within the lock case a roll-back arm 51 provided with abutment flanges 52, which engage with a pin or stud 53 carried by the end of the upper tumbler barrel and limiting the movement of the roll-back arm to half a revolution in one direction. This half revolution is in a clockwise direction, or toward the left, from the position shown in Fig. 7 of the drawings, and can be imparted to the roll-back by either of the plurality of keys mentioned that is, the floor-master and grand-master keys, for example. This movement will bring the end of the roll-back arm in the course of its downward movement against the strike lug 10 carried by the end of the latch bolt 3, and will retract said latch bolt when the dead-locking slide has not been projected in the rear thereof. If the deadlocking slide has been projected, these keys cannot retract the latch bolt. It will be seen, therefore, that if the thumb-turn on the interior of the door is actuated to project the locking slide 11 to dead-lockingposition, the maid or housekeeper using the floor-master and grand-master keys respectively, cannot retract the latch bolt 3 from the exterior of the door and enter the bath room, for example. Certain other keys, however,such, for example, as the change keycarried by the occupant of the apartment, and what I term the emergency key, which is usually retained in the oflice of the owner of the building, are so bitted that the pin tumblers are retracted to permit both the inner and outer tumbler barrels or sleeves 49-50 to be rotated, thus permitting the roll-back arm to make a complete revolution. In the event that the latch bolt has been dead-locked from the interior by means of the thumb turn and dead-locking slide, these keys therefore can be used to rotate the roll-back arm 51 in a counterclockwise direction to bring the end of said arm 51 against the cam face 20 of the pivoted pawl 17, which, when the slide 11 is in projected bolt locking position (see Fig. 5), will move said pawl inwardly against the anti-friction roller 16, and by reason of its beveled edge 19 contacting therewith, move said pawl and the slide 11 upwardly into retracted position, whereupon the key may be turned to rotate the roll-back arm 51 in a clockwise direction to engage with the strike lug 10 of the latch bolt 3 and retract the same.

to extend back and fit into the key-slot 4st of the shutout dog, its end seating in the centering recess 4L5 of the lock case.

Prior to the insertion of the shut-out key, however, the emergency key, for example, is used to project the dead-locking slide into bolt locking position, this being accomplished by rotating the roll-back arm 51 in a counterclockwise direction sufiiciently far to engage the strike lug 54 carried by the dead-locking slide, and move said slide downwardly. The change key carried by the occupant of the apartment may perform this operation also, but is usually employed for another purpose, to be hereinafter described. When the dead-locking slide has been thus projected, by the emergency key, for instance, this key is withdrawn and the shut-out key is inserted and slightly turned to move'the abutment end 46 of the shut-out dog into the recess 47 adjacent the end of the dead-locking slide, which recess has been positioned to cooperate with said end by the downward projection of said slide. When this shut-out dog has been projected, it is obvious that the dead-locking slide cannot be retracted by any of the keys mentioned or by the thumb-turn on the interior of the door, so

that access to the bathroom from the shut-' out apartment is impossible. The only manner in which the door may be opened is b using this shut-out key to retract the shut-out dog from looking engagement with the locking'slide, and then retracting by the occupant of an apartment (and the emergency key, for that matter, although it is not employed in practice for that purpose) may be used to prevent access to the apartment from the adjacent apartment through the medium of the bathroom door.

This is accomplished by first rotating the roll-back arm 51 ina counterclockwise direction to engage the strike lug 54 of the dead-locking slide and project said slide into bolt locking position. The roll-back arm is then rotated in a clockwise direction, this movement causing the end of the roll-back arm to engage with the under face of the pivoted pawl 17 and move it outwardly against the tension of its spring from the position shown in Fig. 5 to that shown in Fig. 6, this movement causing its cam face 20 to engage with the projection 35 of the blocking dog 32 and move said dog on its pivot and bring its blocking arm 34 in the path of movement of the abutment arm 28 and shoulder 29 of the thumb-turn hubs 25. This will prevent the operation of this thumb-turn from the interior of the door to retract the dead-locking slide, as the shoulder 29 will engage with the blocking arm 34: and be prevented thereby from movement to retract the said slide. This blocking arm 34 is automatically thrown out of thumb-turn blocking position by the lug 37 of the slide engaging with the abutment finger 36 of the locking dog when the pivoted pawl 17 is actuated by either the change key or the emergency key, to retract the dead-looking slide 11 (Fig. By this means the occupant of an apartment may unlock the bathroom door so that entry may be had to his apartment from the interior of the bathroom and through the medium of the thumb-turn, or may entirely unlock said door so that entry may be had by turning the interior knob.

It should be noted that entry into the bathroom through the apartment side can only be secured by the use of the change key carried by the occupant of said apartment, which change key is used to rotate the rollback arm 51 so that it will engage with the strike lug '10 of the latch bolt and retract the same in the manner hereinbefore described. It should also be noted that the shut-out key not only shuts out access to the bathroom from the apartment side, but also shuts out entry into this apartment from the bathroom side, so that the occupant of the adjoining apartment cannot enter in and use this first apartment. The shutout dog 40 is held in its projected and retracted positions by a detent carried by the lock case. engaging either side of a V-shaped projection formed in the leaf spring 56 suitably carried by the shut-out dog.

While I have described a specific embodiment of my invention, I desire it understood that various changes in the structure thereof are possible within the spirit of the invention and the scope of the appended claims.

What I claim, therefore, and desire to secure by Letters Patent, is:

1. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted through a key, independent means whereby said bolt may be dead-locked against retraction by said key and knob spindle, means operable by a second key for retracting said bolt when dead-locked through said independent means, and means operable to lock the door closed with said bolt held against retraction by any of the previously mentioned bolt-retracting means.

2. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted from the interior through a knob spindle, means whereby said bolt may be independently retracted from the exterior through a key, independent means operable from the interior whereby said bolt may be deadlocked against retraction by said exterior key, means operable from the exterior by a second key whereby said bolt may be retracted when dead-locked from the interior through said independent means, and means operable from the exterior to lock the door closed with said bolt held against retraction by any of the previously mentioned retracting means.

3. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted through a key, a movable member adapted to be positioned to dead-lock said bolt against retraction by said knob spindle and said key, means operable by a certain .key for moving said member from dead-locking position and for retracting said latch bolt, and means operable to lock the door closed with said latch bolt locked against retraction by any of the previously mentioned retracting means.

4. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted through a key, a movable member adapted to be positioned to dead-lock said bolt against retraction by said knob spindle and key, independent manually operable means for moving said member into and out of dead locking position, means operable by a certain key for retracting said member from dead-locking position when so positioned through said independent means and for retracting said bolt, and means operable to lock the door closed with said movable member in dead-locking position and held in said position against retraction by any of the previously mentioned retracting means.

5. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted through a key, a locking slide adapted to be positioned to dead-lock said bolt against rctraction by said knob spindle and said key, independent manually operable means cooperating with said slide and adapted to move the same into and out of dead-locking position, means operable by a certain key for retracting said slide from dead-locking position when so positioned through said independent means and for retracting said bolt, and means operable to lock the door closed with said slide positioned to deadlock said bolt and held against retraction by any of the previously mentioned retracting means.

6. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted through a key, a locking slide adapted to be positioned to dead-lock said bolt against retraction by said knob spindle and said key, independent manually operable means cooperating with said slide and adapted to move the same into and out of dead-locking position, means operable by a certain key for retracting said slide from dead locking position when so positioned through said independent means and for retracting said bolt, an abutment formed on said slide, a movable locking dog adapted to engage said abutment when said slide is moved to dead-locking position to thereby hold said slide against retraction from suchposition, and means operable to move said locking dog to engage said slide abutment and deadlock said bolt against retraction by any of the previously mentioned bolt-retracting means.

7. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted through a key, independent means operable to deadlock said bolt against retraction by said key and to free said bolt, means operable by a certain key for retracting said bolt when dead-locked through said independent means, and means operable through a certain key for dead-locking said bolt and for blocking the operation of said independent means to free said bolt.

8. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted from the interior through a knob spindle,

means whereby said bolt may be independently retracted from the exterior through a key, a movable member adapted to deadlock said bolt against retraction by said knob spindle and key, independent means manually operable from the interior for moving said member into and out of deadlocking position, means operable from the exterior through a certain key whereby said bolt may be retracted when dead-locked from the interior by said independent means, and means whereby a certain key operable from the exterior may position said movable member to dead-lock said bolt against retraction by said interior knob spindle and may block the retraction of said member from such position by said independent manually operable means.

9. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted from the interior through a knob spindle, means whereby said bolt may be independently retracted from the exterior through a key, a movable member adapted to dead-lock said bolt against retraction by said knob spindle and key, independent means manually operable from the interior for moving said member into and out of dead-locking position, means operable from the exterior through a certain key whereby said bolt may be retracted when dead-locked from the interior by said independent means, a blocking member adapted to be positioned to block the operation of said independent means to move said movable locking member out of dead-locking position, and means whereby a certain key operable from the exterior may position said movable member to dead-lock said bolt against retraction by said interior knob spindle and may position said blocking member to block the operation of said independent means to retract said movable member from dead-locking position.

i 10. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted from the interior through a knob spindle, means whereby said bolt may be independently retracted from the exterior through a key, a movable locking slide adapted to be positioned to dead-lock said bolt against retraction by said knob spindle and said key, independent means manually operable from the interior for moving said locking slide into and out of dead-locking position, a

blocking member adapted to be positioned to block the operation of said independent means to move said slide out of locking position, a movable pawl member carried by said slide, and means whereby a certain key operable from the exterior may move said slide to dead-locking position and may actuate said pawl member to move said blocking member in position to block the operation from the interior of said independent means to move said slide from such locking position.

11. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted from the interior through a knob spindle, means whereby said bolt maybe independently retracted from the exterior through a key, a movable locking slide adapted to be positioned to dead-lock said bolt against retraction by said knob spindle and said key, independent means manually operable from the interior for moving said locking slide into and out of deadlocking position, a pivoted blocking dog independent of said-slide and adapted to be positioned to block the operation of said independent means to move said slide from dead-locking position, a pivoted pawl carried by said slide, means whereby a certain key operable from the exterior may move said slide to dead-looking position and may operate said pawl to position said blocking dog to block the operation of said independent means to retract said slide, and means whereby the retraction of said slide from looking position moves said blocking dog from blocking position relative to said independent operating means.

12. In a lock, in combination, a latch bolt means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted through a key, independent means operable to dead-lock said bolt against retraction by said key and to free said bolt, means operable by a certain keyfor retracting said bolt when dead-locked through said independent means, means operable through a certain key for dead-locking said bolt and for blocking the operation of said independent means to free said bolt, and means operable to lock the door closed with said bolt held against retraction by any of the previously mentioned bolt-retracting means.

' 13. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted from the interior through a knob spindle, means whereby said bolt may be independently retracted from the exterior by a key, a movable member adapted to be positioned to dead-lock said bolt against retraction by said knob spindle and key, independent means manually operable from the interior adapted to operate said movable member into and out of dead-locking position, means operable by a certain exterior key for retracting said bolt when dead-locked by said movable member from the interior, means operable by a certain exterior key for operating said movable member to dead-locking position and for blocking the retraction of said member from such position through said independent means on the interior, and means operable to lock the door closed with said bolt held against retraction by any of the previously mentioned bolt retracting means.

14. Ina lock, in combination, a latch bolt,

, means whereby said bolt may be retracted from the interior through a knob spindle, means whereby said bolt may be independently retracted from the exterior through a key, a movable member adapted to dead lock said bolt against retraction by said knob spindle and key, independent means manually operable from the interior for moving said member into and out of deadlocking position, means operable from the exterior through a certain key whereby said bolt may be retracted when dead-locked from the interior by said independent means, a blocking member adapted to be positioned to block the operation of said independent means to move said movable locking member out of dead-locking position, means whereby a certain key operable from the exterior may position said movable member to dead-lock said bolt against retraction by said interior knob spindle and may position said blocking member to block the operation of said independent means to retract said movable member from deadlocking position, locking 1]]?11115 cooperating with said movable member and adapted to lock the same against retraction when moved to dead-locking position, and means operable from the exterior for so positioning said locking means whereby said door is held closed and said bolt is locked against retraction by any of the previously mentioned bolt-retracting means.

15. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted from the interior through a knob spindle, means whereby said bolt may be independently retracted from the exterior through a key, a movable locking slide adapted to be positioned to dead-lock said bolt against retraction by said knob spindle and said key, independent means manually operable from the interior for moving said locking slide into and out of dead-locking position, a blocking member adapted to be positioned to block the operation of said independent means to move said slide out of locking position, a movable pawl member carried by said slide, means whereby acertain key operable from the exterior may move said slide to dead-locking position and may actuate said pawl member to move said blocking member in position to block the operation from the interior of said independent means to move said slide from such locking position, a movable locking dog adapted to cooperate with said slide when moved to deadlocking position to lock said slide against retraction from such position, and means operable from the exterior for moving said locking dog to lock said slide against rctraction and dead-lock said bolt against retract-ion by any of the previously mentioned bolt-retracting means.

AUGUST ARENS.

Witnesses CHAS. A. Pnann, HnNnERsoN F. HILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

